1. Human Body Systems
7.12 B Identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems.

2. Structure: What are the parts? Joints and bones
Skeletal System
Function: What is its job? body and its muscles, contains materials to make new blood cells.

3. Muscular System
Structure: What are the parts? 3 types of muscle: skeletal, smooth, and cardiac; ligaments and tendons
Function: What is its job? Allows the body to move when attached to bone, allows movement in internal organs such as the heart and intestines, provides strength, balance and warmth.

4. Digestive System
Structure: What are the parts? Mouth, esophagus, stomach, small and large intestines, anus
Function: What is its job? Converts food into simpler substances for the body to absorb as nutrients, breakdown of food also provides energy for all body functions.

5. Circulatory Systems Function: What is its job?
Structure: What are the parts? Includes heart, arteries (distribute to body) and veins (carry deoxygenated blood to heart)
Function: What is its job?
Circulates blood through the body, supplies cells with oxygen and nutrients, removes waste products.

6. Function: What is its job?
Respiratory System
Structure: What are the parts? Airways such as trachea, lungs, and alveoli
Function: What is its job?
Supplies blood with oxygen in the lungs, and removes carbon dioxide.

7. Structure: What are the parts? Kidneys, bladder
Excretory
Function: What is its job?
Filters water and fluids from the blood while also collecting urine waste.

8. Structure: What are the parts? Skin, hair, nails, and sweat glands
Integumentary System
Function: What is its job?
Continuously receives communication with the external environment (temp, humidity) and protects body deeper tissues, excretes waste. Helps rid body of heat, synthesizes Vitamin D.

9. Structure: What are the parts? Brain, spinal cord, and nerves.
Nervous System
Structure: What are the parts? Brain, spinal cord, and nerves.
Function: What is its job?
Sends immediate and specific info as electrical impulses, control center coordinating all actions and reactions work together and are the bodies 2 systems for control and communication.

10. Structure: What are the parts? Glands, hormones
Endocrine System
Function: What is its job?
Sends signals in form of hormones to the body but more slowly than nervous system, controls growth, reproduction, and metabolism.

11. Structure: What are the parts? Lymph nodes, tonsils, spleen
Immune System
Function: What is its job?
Responds to pathogens and provides defense to the body’s systems from disease caused by viruses and bacteria.

12. Reproductive System Function: What is its job?
Structure: What are the parts? Females: Uterus, ovaries Males: Penis, testicles
Reproductive System
Function: What is its job?
Allows humans to continue as a species by fertilizing a female ovum with a male sperm through sexual reproduction.